Is it free and secure?

Yes. Default mode parses entirely in your browser (no upload). Optional server parsing is available for very large files under 10 MB.

Standard .csv files (comma/semicolon/tab/pipe delimited).

Does it work on mobile?

Yes, fully responsive and mobile-optimized.

Is there a row limit?

No hard limit beyond the 10 MB file size cap and your device memory.

Is my data ever logged or stored?

No. In default mode nothing leaves your device. Server parsing (optional) reads in memory only to return JSON to your browser.

Online CSV Viewer 2025

Upload and view any CSV file instantly in your browser – No registration, no ads
Max file size: 10 MB • Works with large and wide CSVs

Privacy-first • Client-side by default

Choose CSV

First row is header Use server parser (fallback)

Ready.

Drag & drop your CSV file here, or click to select (max 10 MB)

What is Online CSV Viewer?

Excel grid preview of an online CSV viewer, upload CSV, copy columns, free, secure, fast

Online CSV Viewer is a free, secure, and ultra-fast tool to open and analyze CSV (Comma-Separated Values) files directly in your browser. All processing happens locally by default – your CSV file is not stored or tracked. Perfect for business, HR, finance, data science, students, or anyone who needs to view and edit spreadsheet data safely.

Privacy-first: Client-side parsing by default. Optional server parsing for large files (< 10 MB).
Excel-like: Sort, filter, edit, copy/paste, find/replace, undo/redo.
Flexible: Auto delimiter detection (comma/semicolon/tab/pipe), custom encoding options.
Export: Download your work as CSV or JSON with one click.

How to Use?

Click Choose CSV or drop your CSV file into the area above.
Data appears below in an editable grid. Use keyboard for quick navigation.
Filter, sort, edit, and export your results without leaving your device.

Keyboard shortcuts: Enter/F2 edit • Ctrl+F find • Ctrl+H replace • Ctrl+Z undo • Ctrl+Y redo • Ctrl+C/V copy/paste

Frequently Asked Questions (CSV Viewer FAQ)

Is it free and secure? Yes, free and secure. Default mode never uploads your data. Optional server parsing is a fallback for big files.
What file types? Standard .csv (comma/semicolon/tab/pipe delimited, max 10 MB).
Mobile support? Yes. Fully responsive and mobile-optimized.
Row limit? No fixed limit; keep the file under 10 MB and within device memory constraints.
Any logs or tracking? No. We do not log or store your CSV contents.